Kanske kan klimatet trots allt spela en roll i det amerikanska valet, tyvärr kommer det in så sent i bilden att vi i vilket fall inte kommer få några vallöften från presidentkandidaterna. Men kanske ger det Obama den där lilla extra skjutsen han behöver för att ta hem en ny fyra års period.Uppdatering: Bloomberg går nu ut och stöder Obama."Mitt Romney, too, has a history of tackling climate change. As governor of Massachusetts, he signed on to a regional cap-and-trade plan designed to reduce carbon emissions 10 percent below 1990 levels. "The benefits (of that plan) will be long-lasting and enormous – benefits to our health, our economy, our quality of life, our very landscape. These are actions we can and must take now, if we are to have `no regrets' when we transfer our temporary stewardship of this Earth to the next generation," he wrote at the time.

He couldn't have been more right. But since then, he has reversed course, abandoning the very cap-and-trade program he once supported. This issue is too important. We need determined leadership at the national level to move the nation and the world forward.

One sees climate change as an urgent problem that threatens our planet; one does not. I want our president to place scientific evidence and risk management above electoral politics."